Finding the Fourth Proportional to 1,111.48, 1,668.70 and 699.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.48 : 1,668.70 = 699.32 : x
2. Step 2: Convert to fraction form
   1,111.48/1,668.70 = 699.32/x
3. Step 3: Cross multiply
   1,111.48x = 1,668.70 × 699.32
4. Step 4: Simplify right side
   1,111.48x = 1,166,955.28
5. Step 5: Solve for x
   x = 1,166,955.28/1,111.48
6. Step 6: Final answer
   x = 1,049.91